/*  
    This file is part of the Arctic Fox Code Tree (AFCT).
    Copyright 2002, Arctic Fox Computer Consulting Inc.

    AFCT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    AFCT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with AFCT; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

package org.afox.util.validators.string;

import org.afox.util.validators.*;

public class MinLengthValidator extends Validator
{
	private int minLength = 0;

	public MinLengthValidator(int aMinLength)
	{
		this(null, aMinLength);
	}

	public MinLengthValidator(int aMinLength, String errorMessage)
	{
		this(null, aMinLength, errorMessage);
	}

	public MinLengthValidator(Validator previous, int aMinLength)
	{
		super(previous);
		setLength(aMinLength);
	}

	public MinLengthValidator(Validator previous, int aMinLength, String errorMessage)
	{
		super(previous, errorMessage);
		setLength(aMinLength);
	}

	private void setLength(int aValue)
	{
		if (aValue<0)
			throw new IllegalArgumentException("Length must be > 0");
		minLength = aValue;
	}

	protected void validateImpl(Object theParameter) throws ValidateException
	{
		String target = (String) theParameter;
		if(target.length()<minLength)
			throw new ValidateException(getErrorMessage("Min Length (" + 
								    minLength +") not met: " +
								    "\"" + target + "\" (" + 
								    target.length() + ")"));
	}
	protected String getDescription()
	{
		return "Strings must be a minimum of " + minLength + " characters in length.";
	}

}
